Question

question 49
0.25 pts
which two bones compose the shoulder girdle?
○ humerus and ulna
○ ulna and clavicle
○ clavicle and scapula
○ humerus and scapula
question 50
0.25 pts
the bone that articulates with the temporal bone in the only movable joint of the skull is the
○ maxilla.
○ zygomatic.
○ mandible.
○ lacrimal.
question 51
0.25 pts
just as individual bones are the organs of the skeletal system, individual muscles are the organs of the muscular system.
○ true
○ false

Explanation:

Question 49

The shoulder girdle (pectoral girdle) is composed of the clavicle (collarbone) and scapula (shoulder blade). The humerus is the arm bone, and the ulna is a forearm bone, so they don't form the shoulder girdle.

The only movable joint in the skull is the temporomandibular joint, where the mandible (lower jawbone) articulates with the temporal bone. The maxilla (upper jaw), zygomatic (cheekbone), and lacrimal (tear - producing bone) do not form this movable joint with the temporal bone.

In the skeletal system, individual bones are organs as they have different tissues (bone, cartilage, etc.) working together. In the muscular system, individual muscles are organs as they are composed of muscle tissue, connective tissue, etc., and perform the function of movement. So the statement is true.

Answer:

C. clavicle and scapula

Question 50